Do you have a terminal plugged into the command line serial port? What does it say is happening? --- Graham
On Sun, Feb 28, 2016 at 3:14 PM, Graham <gra...@flex-radio.com> wrote: > > Alex: > > You are probably trying to draw too much power through the USB port from > the BBB. > I would try the same setup, but using a Powered USB Hub. See if any of > your hubs have a > wall-wart accessory that can power the hub directly, and take the power > load for > all the USB devices away from the BBB. > > --- Graham > > == > > On Sunday, February 28, 2016 at 1:25:16 PM UTC-6, awesomea...@gmail.com > wrote: >> >> Hi all, >> >> So i have a bealge bone black with a 4.3 LCD cape running on debian. I >> also have a usb hub with 4 output. I currently use 3 of these output (wifi >> dongle, usb key and a prolific usb to DB9 serial adapter). >> >> The serial adapter is here to read some values from an industrial scale. >> >> Here is the problem. if the BBB is connected to a computer via the mini >> usb port, everything run well. (with an without a 2.5 amp on the power >> barrel.) >> >> The second that i disconnect the BBB from the computer, the serial >> adapter will only receive 0xff caracter. Iv'e tried on others computer with >> DB9 connector to exclude the scale from the equation. >> >> I have no clue and I can't leave a computer connecter to the BBB just to >> get the serial adapter happy... >> >> ps. I have 3 different serial adapter and same result for all. Also 3 >> different usb hub. >> >> >> Thanks in advance >> >> Alex >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/OwteDyHFF9E/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
